Updating iphone 3gs to new software
in Australia and Japan on June 26, and internationally in July and August 2009.The i Phone 3GS runs Apple's i OS operating system.
Voice Over, Color Inversion, and Text Zoom were introduced as exclusive features to the i Phone 3GS.
The i Phone 3GS is powered by an internal 3.7 V 1220 m Ah rechargeable lithium-ion polymer battery and is designed to retain up to 80% of its original capacity after 400 full charge and discharge cycles.
A battery life indicator in percentage was also exclusive to the i Phone 3GS.
Voice Over is a feature that dictates music details, system menus, text, and other things which was first introduced on the third generation i Pod shuffle.
Color inversion reverses the color scheme from black on white to white on black, while Text Zoom allows users to zoom into a text on the screen.